Inclinometer



other'fe'atures of construct-ion and in the f4 downwardl Patented May '24, 1.927.

A UNITED s'rivres roFF'lcE.

Thisinvention relates to an inclinometer 'which is mainlyl designed for automobiles. and aeroplanes, the general Aobject of the invention being to provide means* for indi- 5 eating the incline in which the apparatus on which the device is placed is ascendingor descending, the graduations being degrees of a circle. `3 y Another object of theinvention is to prow. lo'vide means for permitting the device to be adjusted so that .it will lnormally register zero .when the; automobile'or aeroplane is in a horizontal position.

-This invention also consists in certain combination and arrangement of the several pa rts,to be hereinafter -fully described, i1- ]us'trated in the accompanying drawings and specifically pointed-out in the appended 2.0 claim.

In describingl my invention iirdetail, reference will'. be had' to 'the' accompanying.

drawings, wherein like characters denote like or corresponding .parts throughout the Figure Il is a perspective view ofthe device. v

Figure' 2 is a plan view thereof. Figure 3 is alongitudiual sectional view through onev end ofthe device. Figure4 is a section on lined-4 of Figure 3.

vFigure 5 is a ure2. l vIn these views, 1v indicates abase plate which; is adapted to be fastened to apart of thea'pparatus'on which the invention is to be used, said 'plate being of elongated I shape, and :2 indicates the casing offthede-y -vice .which has its top part shaped inlie arc of a circle, 'with its endsextended,v as atB'.- j 'The bottom ofthe casin 'is open and said. casing isof greater wi thfthan the base plate.'` One' end of -the'casing is split, as at.

4,.with ltheouter walls of the* split curving and outwardly, so that the e curvedwal s engaging the upper v corners off the base plate when pressure. 'is appliedv to `the casing Awill move thejsides-of t e. casing 5.0 outwardly and thus permitthe casingntgbe .moved ldownwardly a slight extent upon the base. If desired, both ends of vtheleasin'g may be split. Thexeasing is held to thebase by the screws 5 which pass through the ends 31and a spring 6 surrounds the screw which holds the split end of the casing in position.

' Of icourse, if both ends are split, a spring Would be'placed on each screw. This spring tends tohold the casing in raised-position.

A groove 7 .is formed in the arc-shaped part of tliehcasing and extends longitudinally thereof and an arc-shaped bubbleglass 8 is held in the said groove by the clips 9 at the ends thereof. The Hat part 10 of the curved portlon of the casing at each side ot' the groove is providedfwith the graduations ll .Y

which indicate degrees of a circle. 'By prolVid-in the Groove the bubble dass is )ro- L D 7 b tected against injury. j

From' the. foregoing, it will be seen that the device willfindicate in degrees the grade at which an. automobile is climbing or down which it is descending, andwhen used on an I aeroplane, will indicate. to the pilot Whether he is descendingorascending and the ldegree ofthe inclination..

' I prefer to make the bubble of Asuch-a length that it will cover ten degrees, as shown in the drawings. By making .the casing adjustable onthe base, the device can be.

set at zero afterbeing placed in' position.

It is thought from the'foregoing description tha-t'the 'advantagesand novel features of my invention 'will be readily apparent.

I desire it tobe understood that I may 'make changes in the construction and in the combination .and arrangement-of the several parts, provided that such changes fall Withinthe scope of the appended claim.

What I claimis device of kthe class described comprising abase plate,'la caslng having an arc-shaped lupper edge, with extensions at its ends, one

end beingsplit,- with the'walls vof the split curving outwardly/:to engage the corners of. .the plate, screws passingthrough the exten-` sions and -into"the late, a, spring on the screw which passes t rough the split end'extension for holding' this end extension against the head ofthesc'rew', an arc-shaped bubble glass in the groove and the facesof .the arc-shaped partat the sides of the groove being graduated with de es ofai, circle. testimony whereof atlix my signature. 

